CN104579529A - Method and equipment for synchronizing state information - Google Patents
Method and equipment for synchronizing state information Download PDFInfo
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- CN104579529A CN104579529A CN201310500244.1A CN201310500244A CN104579529A CN 104579529 A CN104579529 A CN 104579529A CN 201310500244 A CN201310500244 A CN 201310500244A CN 104579529 A CN104579529 A CN 104579529A
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Abstract
The invention discloses a method and equipment for synchronizing state information. The method and the equipment are applied to a passive optical fiber network PON network. The method comprises the following steps: acquiring state information through an optical line terminal (OLT); generating a state message according to the acquired state information by the OLT, wherein the state message carries type tag information; transmitting the state message to an optical network unit (ONU) by the OLT, so as to enable the ONU to synchronize the state information according to the state message. Therefore, the problem that a base station at the downstream of the ONU cannot acquire the state information is solved.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of method and apparatus of Synchronization Status Message.
Background technology
Along with the development of mobile communication technology, it needs the support obtaining simultaneous techniques, as switching, roaming etc. between stable, the aligning of uplink and downlink timeslot of carrier frequency, reliable high-quality transmission, base station, all needs accurate Synchronization Control.As, GSM(Global System For Mobile Communications, global system for mobile communications), TD-SCDMA(Time Division-Synchronization CodeDivision Multiple Access, the CDMA (Code Division Multiple Access) of time division synchronous), WCDMA(WidebandCode Division Multiple Access, WCDMA mobile communication system), CDMA2000, TD-LTE(Time Division Long Term Evolution, time-division Long Term Evolution), FDD-LTE(Frequency Division Duplex-SCDMA, the CDMA (Code Division Multiple Access) of Frequency Division Duplexing (FDD)) etc. base station, all need the synchronous of frequency, as, the base stations such as TD-SCDMA, CDMA2000, TD-LTE, also need precise time synchronously to support.
In the prior art, due to PON(Passive Optical Network, passive optical-fiber network) cost that has of technology is low, lay the features such as convenient, and make small base station, especially Home eNodeB, be usually suitable for adopting this PON transmission technology to return.In order to meet the demand of base station frequency and time synchronized, this just requires that PON equipment can transmit frequency and time synchronization information to base station from the synchronisation source of upstream, as shown in Figure 1.
Inner in PON, clock synchronization mode is: use the physical line clock of PON to complete clock synchronous function, OLT(Optical Line Terminal, optical line terminal) equipment is from network side line-recovered clock signal, or extract clock signal from outside high-precision frequency source, and using this clock as PON line modulation clock; ONU(Optical Network Unit, optical node) equipment from PON line-timing signal recuperation clock, and using the clock that recovers as user side line clock.
Inner in PON, time synchronizing method is: temporal information is delivered to ONU by downlink frame by OLT, when the frame that temporal information is housed arrives ONU, ONU can use this temporal information and its response time to calculate high-precision local clock, and adjusts the ONU time and make it synchronous with OLT.
Realizing in process of the present invention, inventor finds at least there is following problem in prior art:
Although existing PON simultaneous techniques achieves clock between OLT and ONU and time synchronized, ONU cannot know the clock of OLT and time source information and synchronous regime, and therefore, the base station in ONU downstream also cannot obtain these information.And this can bring two problems:
1, when OLT degrades to the synchronizing information of ONU, even if base station have better clock and time synchronized source available time, air interface synchronization such as between base station, owing to cannot know synchronisation source and Synchronization Status Message, base station also just cannot be switched and be followed the tracks of better clock time source.
2, ONU and base station cannot obtain synchronisation source and Synchronization Status Message, affect Simultaneous Monitoring and fault location function when synchronous fault occurs.
Summary of the invention
The object of the embodiment of the present invention is the method and apparatus providing a kind of Synchronization Status Message, with solve existing in the base station being positioned at optical node ONU downstream that cannot realize cannot obtain the problem of state information.
In order to achieve the above object, embodiments provide a kind of method of Synchronization Status Message, comprising:
Optical line terminal OLT obtains state information;
Described OLT generates state message according to the state information obtained, and carries type of message identification information in described state message;
Described OLT sends described state message to optical node ONU, carries out the synchronous of state information to make described ONU according to described state message.
Preferably, described optical line terminal OLT obtains state information, comprising:
Described OLT receives source information, extracts the state information of wherein carrying; Or,
Described OLT generates described state information according to the state of described source information.
Preferably, when described source information is source clock information, described state information is clock status information,
Described OLT generates state message according to the state information obtained, and comprising:
Described OLT, according to the clock status information generated clock state message obtained, carries clock message type identification information in described clock status information.
Preferably, when described source information is source time information, described state information is time state information,
Described OLT generates state message according to the state information obtained, and comprising:
Described OLT, according to the time state information rise time state message obtained, carries time message type identification information in described time state information.
Preferably, described ONU carries out the synchronous of state information according to described state message, specifically comprises:
Described ONU resolves described state message according to described type of message identification information, obtains state information wherein;
Described ONU encapsulates the state information obtained, and the message after encapsulation is sent to base station, carries class information in the message after described encapsulation.
The embodiment of the present invention additionally provides a kind of optical line terminal OLT equipment, comprising:
Acquisition module, for obtaining state information;
Generation module, for generating state message according to the state information obtained, carries type of message identification information in described state message;
Sending module, for sending described state message to optical node ONU, carries out the synchronous of state information to make described ONU according to described state message.
Preferably, acquisition module, specifically for receiving source information, extracts the state information of wherein carrying; Or, generate described state information according to the state of described source information.
Preferably, when described source information is source clock information, described state information is clock status information,
Described generation module specifically for: according to obtain clock status information generated clock state message, carry clock message type identification information in described clock status information.
Preferably, when described source information is source time information, described state information is time state information,
Described generation module specifically for: according to obtain time state information rise time state message, carry time message type identification information in described time state information.
The embodiment of the present invention additionally provides a kind of optical node ONU equipment, it is characterized in that, comprising:
Receiver module, for receiving the state message that optical line terminal OLT equipment sends;
Parsing module, resolves described state message for the type of message identification information according to this message;
Acquisition module, for obtaining the state information of resolving and obtaining;
Sending module, for the message after encapsulation is sent to base station, carries described state information in the message after described encapsulation.
Preferably, when described state information is clock status information,
Described receiver module, specifically for receiving the clock status message that described OLT device sends, carries clock message type identification information in described clock status message.
Preferably, when described state information is time state information,
Described receiver module, specifically for receiving the time state message that described OLT device sends, carries time message type identification information in described time state message.
Compared with prior art, the technical scheme that the embodiment of the present invention proposes has the following advantages:
By applying technical scheme of the present invention, OLT device obtains state information; Described OLT generates state message according to the state information obtained, and carries type of message identification information in described state message; Described OLT sends described state message to ONU, described ONU is by the state information Reseal in the state message that gets, and the message after encapsulation is sent to base station, thus achieve the synchronous of state information between terminal OLT device with relaying ONU equipment, and state information between ONU equipment with base station is synchronous.
Accompanying drawing explanation
Fig. 1 is PON synchronizing network schematic diagram in prior art;
Fig. 2 is the schematic flow sheet of the Synchronization Status Message that the embodiment of the present invention provides;
Fig. 3 is the schematic flow sheet of the synchronised clock state information that the embodiment of the present invention one provides;
Fig. 4 be the embodiment of the present invention two provide lock in time state information schematic flow sheet;
Fig. 5 is the module rack composition of the OLT device that the embodiment of the present invention provides;
Fig. 6 is the module rack composition of the ONU equipment that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the present invention, be clearly and completely described the technical scheme in the present invention, obviously, described embodiment is only section Example of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 2, be the method flow diagram of the Synchronization Status Message that the embodiment of the present invention provides, this flow process comprises:
Step 201, OLT obtains state information.
Wherein, when OLT receives multiple source information, choose the object that a wherein optimum source information is extracted as state information; Choosing for source information, can basis signal principle of optimality choose, and certainly, for how choosing this source information, due to of the prior art to choose mode identical, therefore no longer does concrete elaboration at this;
For the state information obtained, if carry original state information in the source information of this extraction, then obtain this original state information, if do not carry original state information in this source information, then, OLT generates a new state information according to the state of this source information.
Step 202, OLT generates state message according to the state information obtained, and carries type of message identification information in described state message.
Wherein, OLT, when generating state message according to state information, can carry the type of message identification information showing this type of message wherein, and show the class information of this state information grade; Certainly, if needed, other information can also be carried in state message, as source id information, transmit jumping figure etc.
When generating state message, if the state information in this state message is different from the parameter format in original state information, then also needing by conversion process, thus obtaining the state message meeting original state information form.
Step 203, OLT sends described state message to ONU, carries out the synchronous of state information to make ONU.
In this step, ONU is after the state message receiving OLT transmission, and the type of message identification information according to this message is resolved it, obtains the state information of wherein carrying, and records this state information; Also can obtain the class information wherein carried, choose the source information of high-quality according to the class information of this state message, thus make base station, downstream get better state information.
ONU encapsulates the state information obtained, obtain the message after encapsulating, message after this encapsulation is not met to the situation of the form of oneself requirement, need equally to do conversion process, the message finally obtained is sent to base station, the state information in this message is obtained by base station, thus completion status information is synchronous, the encapsulation herein carried out, just encapsulates according to common message encapsulation format, namely, type of message identification information is not carried in the message of this encapsulation yet.
In the present embodiment, OLT obtains state information, state message is generated according to the state information obtained, type of message identification information is carried in described state message, and class information, OLT sends described state message to ONU, to make ONU carry out the synchronous of state information, thus achieves the synchronous of state information between ONU and OLT.
In PON, when carrying out synchronous, the clock synchronous be often referred to and time synchronized, and for how realizing between OLT device and ONU equipment, and the stationary problem of state information between the base station in ONU equipment and its downstream, be described in detail with several specific embodiment below, but be not limited to following embodiment.
Embodiment one
See Fig. 3, be the schematic flow sheet of the synchronised clock state information that the embodiment of the present invention provides, this flow process can comprise:
Step 301, optical line terminal OLT equipment receives multiple clock input source, chooses a clock input source.
Multiple clock input sources in this step can be any one in the clock source of 2M external clock input port input, the clock source by the acquisition of OLT device first line of a couplet interface synchronization ether, the clock source by the acquisition of direct-connected satellite receiver.
Step 302, the clock status information of the clock source selected by OLT device obtains.
Wherein, described clock status information can be that clock source itself comprises, and also can be that clock source itself does not comprise; When not including clock status information in described clock source, OLT device can produce clock status information according to the state in present clock source in inside, for the situation not including clock status information in clock source, may be because OLT directly obtains clock source by satellite receiver, or provide clock source to cause based on onboard clock.
For the clock status information chosen, comprising there being clock source ID, the grade of clock source, clock transmits jumping figure etc.;
Wherein, clock source grade is used for the state that this source information is known in downstream, so that more excellent source information can be chosen according to the grade of this source information in downstream;
Transmit jumping figure and be used for the synchronous hop count information that this source information is known in downstream, and usually, transmit jumping figure more, the performance of clock can be affected, bring shake and noise, thus make downstream can choose the source information of more high-quality.
Step 303, OLT device utilizes described clock status information generated clock state message, carries clock message type identification information in this clock status message.
Wherein, when OLT device utilizes clock status information generated clock state message, if when the state parameter form comprised in this clock status message is different from the form of original clock status information of extraction, need to carry out format conversion to clock status information, and then obtain satisfactory clock status message;
Also clock source grade can be carried in this clock status message.
Step 304, OLT device is to optical node ONU equipment tranmitting data register state message.
Step 305, ONU equipment is resolved for the clock status message received, and obtains the clock status information of wherein carrying.
In this step, ONU equipment, after receiving clock status message, is resolved this clock status message by clock message type identification information, obtains clock status information wherein, and carries out record at equipment of itself;
ONU equipment is when resolving, also can obtain the clock source grade of carrying in this clock status message, when sending message to base station, downstream, the source information of more high-quality can be chosen according to the clock source grade of the clock status message got, thus make base station, downstream get better clock status information.
Step 306, the clock status Information encapsulation of acquisition is become clock status message by ONU equipment, and sends the clock status message after encapsulation to base station.
Wherein, when the state parameter form of the clock status message after this encapsulation is different from clock status information, need equally to carry out format conversion to clock status information.
Step 307, base station obtains the clock status information in this clock status message.
In the present embodiment, optical line terminal OLT equipment receives multiple clock source, choose a clock source, the clock status information of the clock source selected by OLT device obtains, OLT device utilizes described clock status information generated clock state message, clock message type identification information is carried in this clock status message, OLT device is to optical node ONU equipment tranmitting data register state message, ONU equipment is resolved for the clock status message received, obtain the clock status information of wherein carrying, the clock status Information encapsulation of acquisition is become clock status message by ONU equipment, and send the clock status message after encapsulation to base station, wherein carry clock source grade, base station obtains the clock status information in this clock status message, thus achieve between OLT device and ONU equipment, and clock status information between the base station in ONU equipment and downstream is synchronous.
Embodiment two
See Fig. 4, provide for the embodiment of the present invention lock in time state information schematic flow sheet, this flow process can comprise:
Step 401, OLT device receives multiple time input source, chooses a time input source.
Multiple time input sources in this step, can be 1PPS+TOD time input port input time source, by OLT on connecting port 1588v2 synchronous protocol obtain time source, by direct-connected satellite receiver acquisition time source in any one.
Step 402, the time state information of the time input source selected by OLT device obtains.
Wherein, described time state information can be that time source itself comprises, and also can be that time source itself does not comprise; When not including time state information in described time source, OLT device can according to the state in current time source in inner generation time state information, for the situation not including clock status information in time source, may be because OLT directly carrys out acquisition time by satellite receiver, or keep providing time output to cause based on onboard clock.
For the time state information chosen, comprising free source ID, time grade, Time Transmission jumping figures etc., transmit the effect of jumping figure for time grade wherein and clock, identical with above-mentioned clock status information, therefore, no longer do concrete explaination at this.
Step 403, OLT device utilizes described time state information rise time state message, carries time message type identification information in this time state message.
Wherein, when OLT device utilizes time state information rise time state message, if when the state parameter form comprised in this time state message is different from the form of original time state information of extraction, need to carry out format conversion to time state information, and then obtain satisfactory time state message;
Also clock source grade can be carried in this clock status message.
Step 404, OLT device is to optical node ONU equipment transmitting time state message.
Step 405, ONU equipment is resolved for the time state message received, and obtains the time state information of wherein carrying.
In this step, ONU equipment, after receiving time state message, is resolved this time state message by time message type identification information, obtains time state information wherein, and carries out record at equipment of itself;
ONU equipment is when resolving, also can obtain the time source grade of carrying in this time state message, when sending message to base station, downstream, the source information of more high-quality can be chosen according to the time source grade of the time state message got, thus make base station, downstream get better time state information.
Step 406, the time state Information encapsulation of acquisition is become time state message by ONU equipment, and sends the time state message after encapsulation to base station, wherein carries clock source grade.
Wherein, when the state parameter form of the time state message after this encapsulation is different from time state information, need equally to carry out format conversion to time state information.
Step 407, base station obtains the time state information in this time state message.
In the present embodiment, optical line terminal OLT equipment receives multiple time source, choose a time source, the time state information of the time source selected by OLT device obtains, OLT device utilizes described time state information rise time state message, time message type identification information is carried in this time state message, OLT device is to optical node ONU equipment transmitting time state message, ONU equipment is resolved for the time state message received, obtain the time state information of wherein carrying, the time state Information encapsulation of acquisition is become time state message by ONU equipment, and send the time state message after encapsulation to base station, wherein carry clock source grade, base station obtains the time state information in this time state message, thus achieve between OLT device and ONU equipment, and time state information between the base station in ONU equipment and downstream is synchronous.
Based on the design identical with said method, the embodiment of the present invention additionally provides a kind of OLT device, and its structural representation as shown in Figure 5, comprising:
Acquisition module 51, for obtaining state information; Specifically for receiving source information, extract the state information of wherein carrying; Or, generate described state information according to the state of described source information;
Generation module 52, for generating state message according to the state information obtained, carries type of message identification information in described state message;
Sending module 53, for sending described state message to ONU, carries out the synchronous of state information to make described ONU according to described state message.
When described source information is source clock information, described state information is clock status information, described generation module 52 specifically for: according to obtain clock status information generated clock state message, carry clock message type identification information in described clock status information.
When described source information is source time information, described state information is time state information, described generation module 52 specifically for: according to obtain time state information rise time state message, carry time message type identification information in described time state information.
Based on the design identical with said method, the embodiment of the present invention additionally provides a kind of ONU equipment, and its structural representation as shown in Figure 6, comprising:
Receiver module 61, for receiving the state message that optical line terminal OLT equipment sends;
Parsing module 62, resolves described state message for the type of message identification information according to this message;
Acquisition module 63, for obtaining the state information of resolving and obtaining;
Sending module 64, for the message after encapsulation is sent to base station, carries described state information in the message after described encapsulation.
When described state information is clock status information, described receiver module 61, specifically for receiving the clock status message that described OLT device sends, carries clock message type identification information in described clock status message;
When described state information is time state information, described receiver module 61, specifically for receiving the time state message that described OLT device sends, carries time message type identification information in described time state message.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Be only several specific embodiment of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (12)
1. a method for Synchronization Status Message, is applied in passive optical-fiber network PON, it is characterized in that, comprising:
Optical line terminal OLT obtains state information;
Described OLT generates state message according to the state information obtained, and carries type of message identification information in described state message;
Described OLT sends described state message to optical node ONU, carries out the synchronous of state information to make described ONU according to described state message.
2. the method for claim 1, is characterized in that, described optical line terminal OLT obtains state information, comprising:
Described OLT receives source information, extracts the state information of wherein carrying; Or,
Described OLT generates described state information according to the state of source information.
3. method as claimed in claim 2, it is characterized in that, when described source information is source clock information, described state information is clock status information,
Described OLT generates state message according to the state information obtained, and comprising:
Described OLT, according to the clock status information generated clock state message obtained, carries clock message type identification information in described clock status information.
4. method as claimed in claim 2, it is characterized in that, when described source information is source time information, described state information is time state information,
Described OLT generates state message according to the state information obtained, and comprising:
Described OLT, according to the time state information rise time state message obtained, carries time message type identification information in described time state information.
5. the method as described in any one of claim 1-4, is characterized in that, described ONU carries out the synchronous of state information according to described state message, specifically comprises:
Described ONU resolves described state message according to described type of message identification information, obtains state information wherein;
Described ONU encapsulates the state information obtained, and the message after encapsulation is sent to base station, carries class information in the message after described encapsulation.
6. an optical line terminal OLT equipment, is characterized in that, comprising:
Acquisition module, for obtaining state information;
Generation module, for generating state message according to the state information obtained, carries type of message identification information in described state message;
Sending module, for sending described state message to optical node ONU, carries out the synchronous of state information to make described ONU according to described state message.
7. OLT device as claimed in claim 6, is characterized in that,
Acquisition module, specifically for receiving source information, extracts the state information of wherein carrying; Or, generate described state information according to the state of described source information.
8. OLT device as claimed in claim 7, it is characterized in that, when described source information is source clock information, described state information is clock status information,
Described generation module specifically for: according to obtain clock status information generated clock state message, carry clock message type identification information in described clock status information.
9. OLT device as claimed in claim 7, it is characterized in that, when described source information is source time information, described state information is time state information,
Described generation module specifically for: according to obtain time state information rise time state message, carry time message type identification information in described time state information.
10. an optical node ONU equipment, is characterized in that, comprising:
Receiver module, for receiving the state message that optical line terminal OLT equipment sends;
Parsing module, resolves described state message for the type of message identification information according to this message;
Acquisition module, for obtaining the state information of resolving and obtaining;
Sending module, for the message after encapsulation is sent to base station, carries described state information in the message after described encapsulation.
11. ONU equipment as claimed in claim 10, is characterized in that, when described state information is clock status information,
Described receiver module, specifically for receiving the clock status message that described OLT device sends, carries clock message type identification information in described clock status message.
12. ONU equipment as claimed in claim 10, is characterized in that, when described state information is time state information,
Described receiver module, specifically for receiving the time state message that described OLT device sends, carries time message type identification information in described time state message.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110290198A (en) * | 2019-06-21 | 2019-09-27 | 上海东土远景工业科技有限公司 | A kind of GOOSE message sending method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841736A (en) * | 2009-03-20 | 2010-09-22 | 中兴通讯股份有限公司 | Method and system for transferring time in passive optical network (PON) |
| CN101945468A (en) * | 2009-07-08 | 2011-01-12 | 大唐移动通信设备有限公司 | Method, system and device for clock synchronization |
| CN102237940A (en) * | 2010-05-04 | 2011-11-09 | 华为技术有限公司 | Method, system and device for transferring sync-status message (SSM) in passive optical network |
| CN102237941A (en) * | 2010-04-28 | 2011-11-09 | 中兴通讯股份有限公司 | Time synchronization system and method |
| CN102664699A (en) * | 2012-04-12 | 2012-09-12 | 中兴通讯股份有限公司南京分公司 | Method and device for selecting clock sources of microwave network elements |
-
2013
- 2013-10-22 CN CN201310500244.1A patent/CN104579529B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841736A (en) * | 2009-03-20 | 2010-09-22 | 中兴通讯股份有限公司 | Method and system for transferring time in passive optical network (PON) |
| CN101945468A (en) * | 2009-07-08 | 2011-01-12 | 大唐移动通信设备有限公司 | Method, system and device for clock synchronization |
| CN102237941A (en) * | 2010-04-28 | 2011-11-09 | 中兴通讯股份有限公司 | Time synchronization system and method |
| CN102237940A (en) * | 2010-05-04 | 2011-11-09 | 华为技术有限公司 | Method, system and device for transferring sync-status message (SSM) in passive optical network |
| CN102664699A (en) * | 2012-04-12 | 2012-09-12 | 中兴通讯股份有限公司南京分公司 | Method and device for selecting clock sources of microwave network elements |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110290198A (en) * | 2019-06-21 | 2019-09-27 | 上海东土远景工业科技有限公司 | A kind of GOOSE message sending method and device |
| CN110290198B (en) * | 2019-06-21 | 2022-03-04 | 上海东土远景工业科技有限公司 | GOOSE message sending method and device |
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